Improvement in alarm-bells



4 the stud-pin (1.

bearing against the detent h,

5 game cam,

" idz CHESTER PENFIELD, OF NEW BRITAIN, CONNECTICUT I Letters Patent No.85,760, dated Janua/ry 12, 1869.

The Schedule referred to in these Lett ers Patent and making part of thesame.

ings, in which the same letters indicate l ke parts in each of thefigures.

The nature of this invention will be understood from the specificationand drawings..

Figure 1 is aface view of a door and frame, to which this invention isattached.

Figure 2 is a side view of the actuating-device, secured totheframe-work of the door.

a is the plate, to which the bell is secured.

b is the hammer, secured by its handle-huh, a, to

e is an actuating-arm, attached to the same hub, c, of thehammer-handle.

f is a spring, coiled around the pin g, one arm of which has its bearingagainst the bell-spindle, while the opposite end takes bearing againstthe hammerhandle, and holdsit (the hammer) at rest until acted upon bythe actuating-device (see fig. 2) which is secured to the frame-work ofthe 'door. The hammer-handle may be extended through the hammer, so thatthe actuating-device may act directly upon the outer end thereof, andthus dispense with the independent actuating-arm 0.

While at rest, this hammer-handle or arm 0 takes to prevent the hammerfrom resting against the rim of the bell.

i is a wall-plate of the actuating-device, by which it (the device) issecured to the casing.

k is a stud-post, projecting forward at right angle from the plate 1,having a slit or opening in its outer end, in which thetriangular-shaped vibrating catch an is secured by a pin passing throughthe stud Ia, and one corner or angle of said plate m.

This angular plate m is allowed'to vibrate back and forth in the slit,so that first one edge, then the other, is (by its vibration) broughtinto position parallel with the sides of stud-pin k, so that it willfall by its own gravity into position to actuate the bell-hammer, and belifted, and again fall to its position, when the door is closed, in'readiness for a new operation.

This plate is held in an elevated, inoperative position, when desirable,by means of a latch, n, which enters an orifice, 0, formed in the sideof the plate on. Thus the door may be opened and closedwithout actuatingthe bell'; and, when desirable to leave it in position for operation, itis only necessary to turn the latch back out of the orifice 0.

I believe I have thus shown the nature, construction, and advantage ofthis invention, so as to enable others skilled to make-and use the sametherefrom.

What I claim, therefore, and desire to secure by Ixtters Patent, is- Thearrangement of the triangular vibrating catchplate-m, stud andjamb-plate k a in combination with the actuating-arm c of the bell,substantially as described.

CHESTER PENFIELD. [L. s.]

Witnesses:

CHARLES PECK, Enw. L. PRIOR.

